Expansion velocities of galactic bulge planetary nebulae preliminary results

Details Expansion velocities of galactic bulge planetary nebulae preliminary results Expansion velocities of galactic bulge planetary nebulae preliminary results

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aca....43..419a&link_type=abstract

Acta Astronomica, vol. 43, no. 4, p. 419-423

Astronomy and Astrophysics

Astronomy

3

Expansion, Galactic Bulge, Planetary Nebulae, Stellar Evolution, Stellar Temperature, Velocity Distribution, Velocity Measurement, Hydrodynamics, Photoionization, Stellar Mass, Stellar Models, Stellar Spectrophotometry

Scientific paper

The expansion velocity can reveal information about the hydrodynamics in a planetary nebula (PN), as well as about the evolution of the nebula and its central star. The expansion velocity of 27 galactic bulge planetary nebulae (GBPN) was measured. Preliminary results show: (1) the expansion of the GBPN seems to be slower than the expansion of the galactic disc PN; (2) a well defined expansion vs. PN nuclei (PNN) temperature correlation; and (3) a fairly short 'expansion stage', implying young objects and/or high PNN masses.

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